The numbers that are the coordinates to the island in the south pacific are the coordinates to the Losties island.The two shows are, or will become intertwined.They are both happening at the same time in different locations. We will be getting clues from each show about the other.

It isn't entirely impossible that the series connect or are in the same universe. Alias had a crossover with Lost (You All Everybody was played at Eric Weiss's party in Alias); and the timeline of LOST flashfowards seem to end before Fringe begins.

Depending on what they actually represent, the flash-sideways could actually be the parallel universe seen in Fringe.

The character of Walter Bishop looks kinda like pictures of BF Skinner, whose theories inspired the Dharma Initiative.